AceGUI-3.0: TreeGroup: Work around a lag issue related to TreeGroups in WoW 8.0

Basically, TreeGroups cause a hefty lag spike in RefreshTree if they are a child of UIParent (ie. not in a layout yet), and are not anchored to anything.To avoid this spike, skip a refresh in this situation and schedule a new one on the next frame.------------------------------------------------------------------------r1172 | nevcairiel | 2018-04-20 10:57:25 +0000 (Fri, 20 Apr 2018) | 1 lineChanged paths: M /trunk/AceComm-3.0/ChatThrottleLib.lua

AceConfig-3.0: Allow number values for the "width" parameter, which acts as a multiplier of the default width

A multiplier is used instead of a fixed width in pixels to allow more flexible handling in various AceConfig containers, where default widget width may vary.In this design, a numeric value of 0.5 would equal "half", and 2.0 would equal "double", but allowing finer granularity in between as well.